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[mitsubishi_cn105] Simplified protocol lookups (#16399)

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This commit is contained in:
Boris Krivonog
2026-05-13 18:49:32 +02:00
committed by GitHub
parent d7b00047bd
commit 445d841229
1 changed files with 41 additions and 32 deletions
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esphome/components/mitsubishi_cn105/mitsubishi_cn105.cpp
+41 -32
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@@ -30,44 +30,53 @@ static constexpr uint8_t STATUS_MSG_ROOM_TEMP = 0x03;
static constexpr uint8_t PACKET_TYPE_WRITE_SETTINGS_REQUEST = 0x41;
static constexpr uint8_t PACKET_TYPE_WRITE_SETTINGS_RESPONSE = 0x61;
static constexpr std::array<std::optional<MitsubishiCN105::Mode>, 9> PROTOCOL_MODE_MAP = {
std::nullopt, // 0x00
template<auto Unknown, size_t N> struct LookupMap {
using value_type = decltype(Unknown);
static constexpr auto UNKNOWN_VALUE = Unknown;
const std::array<value_type, N> table;
constexpr value_type lookup(uint8_t raw) const { return (raw < N) ? this->table[raw] : UNKNOWN_VALUE; }
constexpr bool reverse_lookup(value_type value, uint8_t &out) const {
static_assert(N <= std::numeric_limits<uint8_t>::max());
if (value == UNKNOWN_VALUE) {
return false;
}
for (uint8_t i = 0; i < static_cast<uint8_t>(N); ++i) {
if (this->table[i] == value) {
out = i;
return true;
}
}
return false;
}
};
template<auto Unknown, class T, std::size_t N> static constexpr auto make_map(const T (&values)[N]) {
return LookupMap<Unknown, N>{std::to_array(values)};
}
static constexpr auto PROTOCOL_MODE_MAP = make_map<MitsubishiCN105::Mode::UNKNOWN>({
MitsubishiCN105::Mode::UNKNOWN, // 0x00
MitsubishiCN105::Mode::HEAT, // 0x01
MitsubishiCN105::Mode::DRY, // 0x02
MitsubishiCN105::Mode::COOL, // 0x03
std::nullopt, // 0x04
std::nullopt, // 0x05
std::nullopt, // 0x06
MitsubishiCN105::Mode::UNKNOWN, // 0x04
MitsubishiCN105::Mode::UNKNOWN, // 0x05
MitsubishiCN105::Mode::UNKNOWN, // 0x06
MitsubishiCN105::Mode::FAN_ONLY, // 0x07
MitsubishiCN105::Mode::AUTO // 0x08
};
});
static constexpr std::array<std::optional<MitsubishiCN105::FanMode>, 7> PROTOCOL_FAN_MODE_MAP = {
static constexpr auto PROTOCOL_FAN_MODE_MAP = make_map<MitsubishiCN105::FanMode::UNKNOWN>({
MitsubishiCN105::FanMode::AUTO, // 0x00
MitsubishiCN105::FanMode::QUIET, // 0x01
MitsubishiCN105::FanMode::SPEED_1, // 0x02
MitsubishiCN105::FanMode::SPEED_2, // 0x03
std::nullopt, // 0x04
MitsubishiCN105::FanMode::UNKNOWN, // 0x04
MitsubishiCN105::FanMode::SPEED_3, // 0x05
MitsubishiCN105::FanMode::SPEED_4 // 0x06
};
template<typename T, size_t N>
static constexpr std::optional<T> lookup(const std::array<std::optional<T>, N> &table, uint8_t value) {
return (value < N) ? table[value] : std::nullopt;
}
template<typename T, size_t N>
static constexpr bool reverse_lookup(const std::array<std::optional<T>, N> &table, T value, uint8_t &placeholder) {
for (size_t i = 0; i < N; ++i) {
const auto &table_value = table[i];
if (table_value.has_value() && table_value == value) {
placeholder = i;
return true;
}
}
return false;
}
});
static constexpr uint8_t checksum(const uint8_t *bytes, size_t length) {
return static_cast<uint8_t>(0xFC - std::accumulate(bytes, bytes + length, uint8_t{0}));
@@ -323,11 +332,11 @@ bool MitsubishiCN105::parse_status_settings_(const uint8_t *payload, size_t len)
if (!this->pending_updates_.contains(UpdateFlag::MODE)) {
const bool i_see = payload[3] > 0x08;
this->status_.mode = lookup(PROTOCOL_MODE_MAP, payload[3] - (i_see ? 0x08 : 0)).value_or(Mode::UNKNOWN);
this->status_.mode = PROTOCOL_MODE_MAP.lookup(payload[3] - (i_see ? 0x08 : 0));
}
if (!this->pending_updates_.contains(UpdateFlag::FAN)) {
this->status_.fan_mode = lookup(PROTOCOL_FAN_MODE_MAP, payload[5]).value_or(FanMode::UNKNOWN);
this->status_.fan_mode = PROTOCOL_FAN_MODE_MAP.lookup(payload[5]);
}
return true;
@@ -382,7 +391,7 @@ void MitsubishiCN105::set_target_temperature(float target_temperature) {
void MitsubishiCN105::set_mode(Mode mode) {
uint8_t placeholder;
if (!reverse_lookup(PROTOCOL_MODE_MAP, mode, placeholder)) {
if (!PROTOCOL_MODE_MAP.reverse_lookup(mode, placeholder)) {
ESP_LOGD(TAG, "Setting invalid mode: %u", static_cast<uint8_t>(mode));
return;
}
@@ -392,7 +401,7 @@ void MitsubishiCN105::set_mode(Mode mode) {
void MitsubishiCN105::set_fan_mode(FanMode fan_mode) {
uint8_t placeholder;
if (!reverse_lookup(PROTOCOL_FAN_MODE_MAP, fan_mode, placeholder)) {
if (!PROTOCOL_FAN_MODE_MAP.reverse_lookup(fan_mode, placeholder)) {
ESP_LOGD(TAG, "Setting invalid fan mode: %u", static_cast<uint8_t>(fan_mode));
return;
}
@@ -432,12 +441,12 @@ void MitsubishiCN105::apply_settings_() {
}
if (this->pending_updates_.contains(UpdateFlag::MODE) &&
reverse_lookup(PROTOCOL_MODE_MAP, this->status_.mode, payload[4])) {
PROTOCOL_MODE_MAP.reverse_lookup(this->status_.mode, payload[4])) {
payload[1] |= 0x02;
}
if (this->pending_updates_.contains(UpdateFlag::FAN) &&
reverse_lookup(PROTOCOL_FAN_MODE_MAP, this->status_.fan_mode, payload[6])) {
PROTOCOL_FAN_MODE_MAP.reverse_lookup(this->status_.fan_mode, payload[6])) {
payload[1] |= 0x08;
}